daty sort

var daty=['2012-06-03','2010-11-07','2002-12-18','1991-03-05','1983-04-17'];
var f = new Array();

for(var i = 0 ; i < daty.length; i++)
{
  f[i] = new Array();
  f[i].iter = i;
  f[i].weekday = new Date(daty[i]).getDay();
}

f.sort(function(a,b){
  if(a.weekday > b.weekday)
    return true;
  else
    return false;
});

for(var i = 0 ; i < daty.length; i++)
{
 document.write("DATA: ");
 document.write(daty[f[i].iter]);
 document.write("Dzien tygodnia: ");
 document.write(f[i].weekday);
}